Climatronic Control Module (J255)

Climatronic Control Module (J255)

Special tools, testers and auxiliary items required

• Hook (3438)

Removing

- Check coding and adaptation of the Climatronic control module using the "Replace control module" function in Guided Fault Finding (if the Climatronic control module is to be replaced). Refer to Vehicle diagnosis, testing and information system (VAS5051B) in the "Guided Fault Finding" function.

- Switch off ignition.

- Place (3438) - B - on Climatronic control module- A - according to illustration (left and right).






- Carefully pull Climatronic control module in - direction of arrow - out of center console.

• To prevent damage to the Climatronic control module and center console, do not pull too hard.

• The Climatronic control module is held by the clips and brackets in the center console. If clips are stuck, they must be loosened from behind with a screwdriver.

• Do not damage surface of center console when removing (cover it if necessary).

• In model year 2007, Climatronic control modules with an additional strip - A - (for reinforcement) on the back side will be installed as a running change. Place (3438) - B - at left and right on this strip - A -.






Climatronic control module (J255) stuck in center console, removing

• At start of production, clips - A - are installed on the Climatronic control module (J255) that hold control head firmly in center console so that it cannot be removed without first loosening the retainer (a revised retainer will be introduced as a running change, the deadline is not yet finalized).






- Remove radio or radio navigation system.

- Remove trim - D -.

- Using a small screwdriver - B -, reach in instrument panel opening and loosen clips retainer - A - (left and right on A/C / heater control head) from center console brackets - C -.

- Slide Climatronic control module- E - out of center console.

Climatronic control module connectors, removing

- Loosen retainers on connector - E - and remove.






- Carefully turn Climatronic control module - F - 180°.

- Release connectors - D -, - A - through - C - by pressing retaining tabs - G - and remove them.

Installing

Installation is carried out in the reverse order while observing the following.

• When replacing a Climatronic control module, observe exact allocation. Refer to Electronic Parts Catalog (ETKA). Different versions, with or without seat heating switch, with different temperature unit (°C or °F) on temperature setting rotary switch, rotary switches with black or silver (chrome-plated) surface.

• Heater control head, replacement part number 8J0 819 043 starting with index "D", may be installed on 5 cylinder vehicles. Refer to Electronic Parts Catalog (ETKA) and Vehicle diagnosis, testing and information system (VAS5051B) in the "Guided Fault Finding" function.

• 5 cylinder vehicle may only have A/C controls, part number 8J0 820,043 starting with index "D". Refer to the Electronic Parts Catalog and Vehicle diagnosis, testing and information system (VAS5051B) in the "Guided Fault Finding" function.

• After replacing/installing Climatronic control module (J255) , always perform the following work using Vehicle diagnosis, testing and information system (VAS5051B) in the "Guided Fault Finding" function

- Recode Climatronic control module (or check code).

- Perform Climatronic control module basic setting.

- Check Climatronic control module DTC memory (and correct cause of any possible malfunctions displayed).

- If necessary, check Climatronic control module adaptation.

- Perform Climatronic control module output diagnostic test mode.